Sounds like they had some windy days and a few squalls, but no "big" storms. Here's a quote from one of the participants' blog, "The last two days have been quite rough with winds 25-35 gusting higher in squalls with 10+ foot seas."
Link to a page with further links to a few blogs: Carib1500 Highlights
p.s. that's my boat pictured on the website's masthead.